Very versitile. My most used wedding lens. It does what you could expect from it

Cons:

None

Extremely sharp for a zoom. Images are stunning and I use this lens on a Eos 1Ds mark II. Even wide open you can get very good results. As always every lens declines somewhat at their far ends. When stopped down at 5.6/8.0 you can get results difficult to beat by primes.